package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;
    @Autowired
    SetmealMapper setmealMapper;

    /**
     * 新增菜品
     *
     * @param dishDTO
     * @return
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();

        //获取口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            //批量插入口味数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> result = dishMapper.select(dishPageQueryDTO);
        long total = result.getTotal();
        List<DishVO> records = result.getResult();
        return new PageResult(total, records);
    }

    /**
     * 批量删除
     *
     * @param ids
     * @return
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断状态是否为起售状态
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品起售中,不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品有没有关联套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishId(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除当前菜品
       /* for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/
        //根据Id集合山出菜品数据
        dishMapper.deleteById(ids);
        //根据Id集合山出口味数据
        dishFlavorMapper.deleteByDishId(ids);
    }

    /**
     * 根据ID查询菜品
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据Id查询菜品
        Dish dish = dishMapper.getById(id);
        //根据菜品Id查询口味
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到DishVO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     *
     * @param dishDTO
     * @return
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //删除菜品现有的口味
        List<Long> dishId = new ArrayList<>();
        dishId.add(dishDTO.getId());
        dishFlavorMapper.deleteByDishId(dishId);
        //将修改后的口味添加进来
        //获取口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            //批量插入口味数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类动态查询菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish> dishs = dishMapper.list(dish);
        return dishs;
    }

    /**
     * 菜品起售,停售
     *
     * @param status
     * @param id
     * @return
     */
    @Override
    @Transactional
    public void startAndStop(Integer status, Long id) {
        //如果要停售,查看是否有关联的套餐
        if (status == StatusConstant.DISABLE) {
            //根据菜品id查询套餐数据
            List<Setmeal> setmeals = setmealMapper.getByDishId(id);
            if (setmeals != null && setmeals.size() > 0) {
                for (Setmeal setmeal : setmeals) {
                    if (setmeal.getStatus() == StatusConstant.ENABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.DISH_ENABLE_FAILED);
                    }
                }
            }
        }
        //更改状态
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.startAndStop(dish);
    }

    /**
     * 条件查询菜品和口味
     *
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}

